Data Sheet
AD8214
Rev. A | Page 13 of 16
HIGH SIDE OVERCURRENT DETECTION
The AD8214 is useful for many automotive applications using the
load configuration shown in Figure 31. Because the part powers
directly from the battery voltage, the shunt resistor must be on
the high side. The AD8214 monitors the current in the path as
long as the battery voltage is between 5 V and 65 V. If the current
reaches an undesirable level that corresponds to the user-selected
threshold, the output of the AD8214 switches states in less than
100 ns. The microcontroller, analog-to-digital converter, or FET
driver can be directly notified of this condition.
CLAMP
DIODE
BATTERY
UP TO 65V
SHUNT
SWITCH
OVERCURRENT
DETECTION (<100ns)
AD8214
V
S
R1
R2
1
IN
1
8
+IN
2
NC 7
V
REG
3
GND
6
NC
4
OUT 5
I
Figure 31. High Side Overcurrent Protection